Lathe-tool.



G. AMBORN.

LATHE TOOL.

` v APPLIGATIONFILED JAN. 25, 1913. 1,1 12,1 85. Patented Sept. 29, 1914.

INVENTOR e@ WTNESSES: {KM/am,

v By U01/Heyy,

@MKM

. the lower si holder and which is provide wlth a on struction the cam as an additional funccular bearing .face with the latter, the t1911, namely, that 0f preventing the sideend of the cam being projected beyond and vwise movement of the tool out of the groove. over the tool receiving groove andI being Tellus end the cam 1s rovi. e with an adapted to clamp the tool against the under# Obllque 0r bev led ace which is pre cut edge of the groove. rI`he cam face o erably oi the sarne angle as the upsuch projecting end is also formed with per' bevel edge of the tool, so that undercut edges so that in addition to clampwhen the latter is cla n it.

uNrrEns'rnfrEs Aivififiairr orrioE.

GEonGE amBoaN, 0E cEArINvIELE, CONNECTICUT.

' miran-roo.

. 1',112,185 Svevieetm 0f Letters Patent Patented Sept. 29, 1914.

Application med January 25, 1913. Serial No. 744,131. To all whom 'it may concern: Fig. 2 is a` top or plan view. Fig. 3 is a taken on Be it kno that I GEORGE AMoRN, a sectional view section taken on wn citizen oi': the 4United States, residing in 4 is a Ghapinville, in the county o Lit d* in Fig. 1. y v

have invented y Referring to the drawings, let A designate mprovements in 4Lathe- -a tool holder of the type re erred to which wide shallow following is a: specifica is provided in its sid is under- The tool genits

ion. v l

' This invention relates to llathe tools and aims to provide certain improvements therein. f v

cut at i which is'indicated by erally flat in shape and is lower edge with a bevel E which is to fit the undercut It is also formed on its upper edge wi similar bevel as shown at F by which it is adapted to be clamped in varying positions in the holder. The holder may be provided if desired with an undercut to {O1-m a Supp@ l edge at the top of the groove although in being usually beveled along its lower ed the present to fit the undercut portion. ln s ch tools l that the holder shall not de ,oi the tool to any otherwise intere operation o the tool 1n pracdirected to what aire being also ools. This wit shallow gitudinally of the holder, the groove being undercut be referred sity o an interlocking. engagement holder-at the top of the tool.

The cam provided by my invention is indicatedby the letter G and extends through the holder above the tool, preferably being d' held in an extension of the holder formed near vthe end of the latter. e holder is bored with a circulargroove Which constitutes a bearing face agains sidewise m groove bythe undercut portion just reierre to; and the upper a clamp which upper edge of the tool, ing the' tool in place,

5 has a lip projecting over thus not only but also preven he to ci the groove B vand is p shape, its face gradually extending from the roved construction centerso asto clamp tools of slightly varyof. clamping and unclamping the.4

lfacilitated while `at the same time the too ing Widths.

is firmly held in place 'in the groove, bot The @am as thus far described is adapted its upper and lower edges being-.supported to press the tool downward in its groove so against sidewise movement. this en the@ lts lower edge 1S 1n fllm engagement in place of the usual lamp 'I provi e a, -AWltll the undeillt C, the tO'Ol being thus.

held againstV tilting. y In the present concam member which exte trate one is a side or cam" through the holder, and to adequately form of the invention,.-Figure 1 hold the cam against this elevation vofthe* holder andtool.' movement l proing the tool in the groove, the cam 'acts to cannot escape sldewlse.. the Operation revent the upper e ge-of the V- tool from of clamping and particularly after the too being displaced sidewiseout of the groove. is clamped and the sidewise thrust occurs, Reerring to the drawings Whichnillusthere is a en'dency to fo c draw the' of the cam while the procam at oneeside of said vide 'a shoulder` K which similar shoulder L formed bears against a cam face on the holder, cam face the shoulder L being preferably formed at `f the bottom of an enl of tle Y "re `th rojeeting over said groove, said geving an undercut or bevel ace of substantially the width of opposite said cani face.

side tool holder or the like havin a v[shallow groove in .it

provided with an internal groove in which fits a spring ring M which against the flange and prevents thedisple'teey` direction away from er. A wrench face g ortion and lso provided .a cam A:face groove, said cam face having an undercut or bevel surface .of substantially the width of said groove adapted to force the tool against the opposite side of the groove and ool against sidewise displacement therein,

7 said enlar em opposite side of said bearin l jeeting over said groove, sai ing an undercut or groove, said cam :tially the width o f said groove adapted to aving agcircular bearing portion, and a -force the tool agalnst the opposite side of cam face projecting over said groove, said the groove and hold the tool against sidecani face having an un rcut or beve sur. I wise displacement thereln. so faefl of substantially the idth of said InN witness whereof, I have hereunto groove adapt d to fore the tool against the signed, my 11215110 111 the Presence 0f tWO oppositesde df the oolve nd hold the subscribing wltneSSeS. too against si ewise is a ment'therein y v l 2. A side i001 iwider mi) the like ha a ,GEORGE AMBORN. shallow groove in its side, and a rotate le Witnesses: i cam at one side of said groove said cam A C B. Hmmm, having a circular 'bear-in portion, and a WIILIAM G. Comi. 

